TDCE Flash Point Elevation via HCFO-1233zd
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Trans-1,2-dichloroethylene (TDCE) poses handling and transportation challenges due to its low flash point, leading to flammability issues, and existing solutions that raise the flash point often increase global warming potential by using high-volatility compounds.
Innovation Solution
A composition comprising a major amount of TDCE mixed with a minor amount of 1-chloro-3,3,3-trifluoropropene (HCFO-1233zd) achieves a flash point significantly higher than TDCE alone, while maintaining low global warming potential, allowing safer handling and transportation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If TDCE is mixed with a large quantity non-flammable compound to raise flash point, then flash point is improved, but global warming potential increases
Solution Approach 1:
The invention changes the concentration parameter by using a minor amount (0.1-10% by weight) of HCFO-1233zd instead of large quantities of traditional additives. This parameter change achieves flash point elevation while minimizing the amount of volatile compound added, thereby reducing global warming potential.
Solution Approach 2:
The invention creates a composite mixture of TDCE and HCFO-1233zd that combines the desirable properties of both components: TDCE provides the base functionality while HCFO-1233zd elevates the flash point. This composite approach achieves flash point improvement without requiring large quantities of high-GWP compounds.
2Temperature
If TDCE is mixed with volatile compounds to raise flash point, then flash point is improved, but volatility increases
Solution Approach 1:
The invention optimizes the concentration parameter of HCFO-1233zd at 0.1-10% by weight, which is sufficient to elevate flash point without significantly increasing overall volatility. This precise parameter control allows flash point improvement while maintaining acceptable volatility levels.
3Temperature
If azeotropic blends are used to suppress flash point, then flash point is improved, but device complexity increases
Solution Approach 1:
The invention extracts only the essential flash point elevating component (HCFO-1233zd) at minimal concentrations (0.1-10% by weight) rather than using complex azeotropic blends requiring multiple components in specific ratios. This simplification maintains flash point improvement while reducing blend complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The TDCE-HCFO-1233zd composition enables safer handling and transportation of TDCE, reducing flammability and global warming potential, making it suitable for foam production, cleaning, and heat transfer applications without the need for high-volatility additives.
Implementation Method 1
Trans-1,2-dichloroethylene in combination with a minor amount of a hydrochlorofluorocarbon wherein the combination exhibits a flash point significantly higher than that of trans-1,2-dichloroethylene alone
Data Source
AI summary
A trans-1,2-dichloroethylene blend which comprises a combination of a major amount of trans-1,2-dichloroethylene and a minor amount of a hydrohaloolefin having an elevated flash point is disclosed The combination exhibits a flash point significantly higher than trans-1, 2 -dichloroethylene alone The preferred hydrohaloolefin is 1-chloro-3,3,3-tr?fluoropropene (HCFO-1233zd) The subject blends find application as heat transfer agents, propellents and sprayable compositions, blowing agents, solvents and cleaning agents.